1) API Spec 5CT
2) Grade: J55, K55, N80,N80-1, N80Q,L80, P110
3) Application :oil pipe, gas
4) Tubing Coupling 1.9''-20''
5) Thread type :EUE
6)Thread through phosphating or copper plating processing, wear-resisting, good sealing, high corrosion resistance, good adhesion, connection strength.
7)Used for connecting two threaded tubing, with internal thread of the cylinder
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